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light

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noun American English pronunciation: light /laɪt/ 
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singularlight
plurallights
  1. 1
    [uncountable] brightness from the sun or from a light, which allows you to see things

    The room gets a lot of light in the afternoons.

    light shines:

    Light from the street lamps was shining through a gap in the curtains.

    a beam/flash/shaft/ray of light:

    The clouds parted and a single beam of light fell on the church.

    by the light of something (=using the light from something):

    The house could be clearly seen by the light of the moon.

    be/stand in someone's light (=to prevent someone from seeing something by standing between them and a light):

    It's harder when you keep standing in my light.

    1. a.
      [singular/uncountable] a particular type of brightness

      the gray light of dawn

      The lamp produces a very warm soft light.

    2. b.

      the light

      brightness from the sun during the day

      The light started to fade so we had to stop playing.

  2. 2
    [countable] a piece of electrical equipment that produces brightness

    I could see a light in the window of the farmhouse.

    turn on/switch on/put on a light:

    Could somebody put the light on?

    turn off/switch off/put off a light:

    I turned the lights off and shut the door.

    a light comes on:

    Lights were coming on in the street.

    a light goes off/out:

    The light flickered and went out.

    a warning/security light:

    A red warning light comes on when the brake fluid is low.

    1. b.
      one of a set of traffic lights

      I nearly drove through a red light.

      Turn left at the lights.

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